Load Specifications
Load data in caliber 6 x 45 mm with .243 | 100gr | Speer Boat-Tail bullet and 54 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 84% | 48,573 psi | 88% | 2343 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 48,153 psi | 87% | 2415 fps | 99.9% |
| Accurate 2460 | <<locked>> | 94% | 46,789 psi | 85% | 2418 fps | 98.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,160 psi | 71% | 2349 fps | 99.4% |
| Accurate 2520 | <<locked>> | 98% | 46,485 psi | 84% | 2451 fps | 97.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 36,463 psi | 66% | 2316 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 90% | 48,834 psi | 89% | 2346 fps | 99.4% |
| Accurate LT-32 | <<locked>> | 90% | 49,342 psi | 90% | 2352 fps | 98.1% |
| ADI AR 2207 | <<locked>> | 88% | 48,965 psi | 89% | 2388 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 46,456 psi | 84% | 2431 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 98% | 47,195 psi | 86% | 2418 fps | 96% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,616 psi | 86% | 2484 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 94% | 49,095 psi | 89% | 2438 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 47,645 psi | 86% | 2359 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 47,311 psi | 86% | 2346 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 96% | 48,080 psi | 87% | 2388 fps | 96.8% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 47,297 psi | 86% | 2480 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 94% | 47,819 psi | 87% | 2451 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 94% | 49,182 psi | 89% | 2477 fps | 98.7% |
| Hodgdon H4198 | <<locked>> | 86% | 48,196 psi | 87% | 2349 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,010 psi | 58% | 1450 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,701 psi | 81% | 2464 fps | 99.4% |
| IMR 4198 | <<locked>> | 92% | 47,747 psi | 87% | 2375 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 48,501 psi | 88% | 2316 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 47,195 psi | 86% | 2418 fps | 96% |
| Lovex D073.4 | <<locked>> | 88% | 47,442 psi | 86% | 2428 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 96% | 49,806 psi | 90% | 2461 fps | 97.5% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 44,338 psi | 80% | 2431 fps | 97.4% |
| Lovex S053 | <<locked>> | 84% | 49,763 psi | 90% | 2306 fps | 100% |
| Norma 200 | <<locked>> | 90% | 48,863 psi | 89% | 2415 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 46,050 psi | 84% | 2405 fps | 95.9% |
| Norma 202ᴾ | <<locked>> | 100% | 45,629 psi | 83% | 2425 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,242 psi | 59% | 1490 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 47,892 psi | 87% | 2346 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 48,008 psi | 87% | 2434 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 98% | 47,601 psi | 86% | 2418 fps | 98.3% |
| Shooters World AR Plus | <<locked>> | 88% | 47,442 psi | 86% | 2428 fps | 97.7% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 44,338 psi | 80% | 2431 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 48,356 psi | 88% | 2392 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 48,530 psi | 88% | 2152 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 46,789 psi | 85% | 2431 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 49,850 psi | 90% | 2444 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 47,050 psi | 85% | 2352 fps | 98.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,929 psi | 72% | 2257 fps | 97.9% |
| Somchem S321 | <<locked>> | 96% | 48,095 psi | 87% | 2457 fps | 96.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,877 psi | 87% | 2388 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 88% | 49,066 psi | 89% | 2349 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 49,429 psi | 90% | 2388 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,907 psi | 89% | 2395 fps | 99.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,814 psi | 74% | 2359 fps | 99.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,163 psi | 78% | 2362 fps | 98% |
| Vihtavuori N530 | <<locked>> | 98% | 48,109 psi | 87% | 2425 fps | 96.2% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,032 psi | 76% | 2359 fps | 97.3% |
| Winchester 748ᴾ | <<locked>> | 100% | 48,776 psi | 89% | 2500 fps | 97.3% |
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 42,192 psi | 77% | 2247 fps | 99.8% |
| Accurate 2015 | <<locked>> | 80% | 27,543 psi | 50% | 2037 fps | 95.9% |
| Accurate 2460 | <<locked>> | 86% | 35,534 psi | 64% | 2228 fps | 95.5% |
| Accurate 2495 | <<locked>> | 86% | 24,700 psi | 45% | 2041 fps | 95.2% |
| Accurate 2520 | <<locked>> | 90% | 35,563 psi | 65% | 2267 fps | 95% |
| Accurate 4064 | <<locked>> | 96% | 31,923 psi | 58% | 2221 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 36,289 psi | 66% | 2136 fps | 97.2% |
| Accurate LT-32 | <<locked>> | 80% | 36,680 psi | 67% | 2142 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 38,058 psi | 69% | 2228 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 33,301 psi | 60% | 2192 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 96% | 44,643 psi | 81% | 2379 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 25,425 psi | 46% | 2044 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,039 psi | 58% | 2149 fps | 98.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,581 psi | 72% | 2234 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,345 psi | 62% | 2126 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 92% | 42,511 psi | 77% | 2300 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 96% | 41,582 psi | 75% | 2388 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 30,574 psi | 55% | 2126 fps | 95% |
| Hodgdon H335 | <<locked>> | 84% | 35,085 psi | 64% | 2234 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 40,016 psi | 73% | 2215 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,018 psi | 44% | 1302 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 29,008 psi | 53% | 2142 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 33,692 psi | 61% | 2136 fps | 99.4% |
| IMR 4227 | <<locked>> | 80% | 45,745 psi | 83% | 2277 fps | 100% |
| IMR 8208 XBR | <<locked>> | 96% | 44,643 psi | 81% | 2379 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 82% | 38,493 psi | 70% | 2280 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 90% | 40,654 psi | 74% | 2320 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 94% | 35,911 psi | 65% | 2283 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 44,367 psi | 81% | 2234 fps | 100% |
| Norma 200 | <<locked>> | 80% | 36,187 psi | 66% | 2215 fps | 99.7% |
| Norma 201 | <<locked>> | 98% | 43,482 psi | 79% | 2362 fps | 95.2% |
| Norma 202 | <<locked>> | 90% | 33,243 psi | 60% | 2201 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,844 psi | 43% | 1332 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,252 psi | 82% | 2306 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 37,188 psi | 67% | 2251 fps | 95% |
| Rottweil R 901 | <<locked>> | 88% | 35,578 psi | 65% | 2208 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 82% | 38,493 psi | 70% | 2280 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 94% | 35,911 psi | 65% | 2283 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 45,658 psi | 83% | 2352 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,408 psi | 75% | 2060 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 33,895 psi | 62% | 2201 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,474 psi | 59% | 2142 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 34,621 psi | 63% | 2139 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 31,270 psi | 57% | 2090 fps | 95.2% |
| Somchem S321 | <<locked>> | 92% | 42,308 psi | 77% | 2365 fps | 95.2% |
| Somchem S335 | <<locked>> | 86% | 31,531 psi | 57% | 2103 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 38,247 psi | 69% | 2195 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,777 psi | 56% | 2070 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 80% | 26,731 psi | 49% | 1985 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 86% | 26,701 psi | 48% | 2060 fps | 95.7% |
| Vihtavuori N140 | <<locked>> | 92% | 33,968 psi | 62% | 2192 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 96% | 44,715 psi | 81% | 2375 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 94% | 34,577 psi | 63% | 2221 fps | 95.1% |
| Winchester 748 | <<locked>> | 94% | 40,103 psi | 73% | 2352 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 54 powders for 6 x 45 mm loaded with the .243 | 100gr | Speer Boat-Tail. Winchester 748 delivers the highest muzzle velocity at 2,500 fps; across all powders the maximum-charge window runs from 1,450 fps to 2,500 fps. Accurate 2495 gives the best case fill at 100 %, and 54 of the 54 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Alliant AR-Comp reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.